Steam-trap.



No. 64I,l36. Patented Jan. 9, I900.

c. w. NASON.

STEAM TRAP.

(Application filed. Oct. 27, 1898.\ (N o M n d 01.)

Nrrnn rates ATENT rrion.

CARLETON W. NASON, OF NEWYORK, N. Y.

STEAM-TRAP.

SPECIFICATION forming part of Letters Patent No. 641,136, dated January9, 1900.

Application filed October 27, 1898. Serial No.'694,669. (No model.)

To (tZZ whom it may concern.-

Be it known that I, CARLETON W. NASON, a citizen of the United States,residing at New York, county of New York, and State of New York, haveinvented certain new and useful Improvements in Steam-Traps and otherCasings, fully described and represented in the following specificationand the accompanying drawings, forming a part of the same.

This invention relates chiefly to improvements in steam-traps of thatclass in which the trap-casing comprises two abutting members, oneprovided on opposite sides of its abutting end with inlet and outletports and the other with similarlylocated inlet and outlet passagesthrough which comm unication is established between the inlet and outletports, respectively, and the interior of the trap. These two members areflanged at their abutting ends and are held together with a suitablepacking between them by means of bolts passing through their flanges atdifferent points between the inlet and outlet points of the trap, or, inother words, the points at which the inlet port and passage and theoutlet port and passage, respectively, meet. Because of the absence ofany securing means between the two members of the casing directly at theinlet and outlet points such traps have, under conditions hereinaftermore particularly pointed out, developed'a serious difficultynamely, theblowing out of the packing between the two members at these points,resulting in leakage and rendering removal of or repairs in the trapnecessary.

It is the object of the present invention to overcome this difficulty;and to that end the invention, generally stated, consists in atrapcasing of peculiar construction and provided directly at the inletand outlet points of the casing with means whereby the two abuttingmembers of the trap-casing are held securely together at these pointsand the liability of leakage thereat entirely prevented.

In the accompanying drawings, Figure 1 is a plan View of a trapembodying the improvements of the present invention in what isconsidered their preferred form. Fig. 2 is a side elevation of the same,and Fig. 3 is a vertical section on the line 3 of Fig. 1.

Referring to said drawings, the trap-casing consists of two members 1 2,the ends whereof abut and which are provided with flanges 3 4:,respectively, through which pass bolts 5, by which the two members areheld together, a suitable packing 6 being interposed between the twomembers for the purpose of securing a steam tight joint. The lowermember 1 of the casing is provided at its abutting end on opposite sideswith inlet and outlet ports '7 8, projecting laterally therefrom intothe plane of the flange 3, while the upper member 2 of the casing, orwhat may be said to constitute the cover or top of the easing, isprovided with two similarly-located inlet and outlet passages 7 8 Theinletpassage communicates at one end with the inlet-port 7 and at ornear its other end through an opening 9 with the interior of the trap,the usual deflector 10 being provided beneath the opening, while thepassage 8 communicates at one end with the outlet-port 8 and at itsopposite end with the interior of the trap through a valve-opening 11 inthe upper end of a pipe 12, extending down into the trap. Thevalve-opening 11 is controlled by a valve let upon the upper end of arod 15, movable vertically in the pipe 12 and connected at its lower endto and movable with a float 16, raised and lowered in the usual way asthe accumulation of water of condensation varies in the trap.

In the operation of the trap as the water enters the trap through theinlet port and passage 7 7 it accumulates in the bottom of the casing,thus raising the float 16 and its valve 14 and closing the valve-opening11. As the water of condensation continues to accumulate it enters thefloat 16, thereby depressing it and withdrawing the valve 14 from theopening 11. The water of condensation is then expelled by the steam inthe casing, which forces it upwardly between the valve-rod 15 and pipe12, and thence outwardly through the outlet passage 8 and port 8.

The trap illustrated as thus far described is a familiar form of theclass of trap heretofore referred to and to which the present inventionparticularly relates. In such traps as heretofore constructed the solemeans relied upon for holding together all portions of the two members 12 have been the flanges 3 4 and their bolts 5. Under ordinary conditionsof steam-pressu re such means have been found efficient for the purpose;but where a very high steam-pressure exists though efficient as to themajor portions of the two members they have been found inefficient sofar as those portions are concerned at which the inlet and outlet portsand passages, respectively, meet, and under such conditions havedeveloped the serious difficulty before referred tonamely, blowing outof the packing at these points and consequent leakage. This difficultyis due to the fact that at these points the trap-casing is subjected togreater strains than at other points, and as a consequence the abuttingends of the two members are spread apart at these points to such anextent as to permit the packing between them to bejblown out. In orderto overcome this diflieultyfit is necessary that the two members shouldbe secured together at these two points in addition to being securedtogether throughout their major portions by the bolts 5 or the like. Asheretofore constructed, however, it has not been practicable to sosecure the two members of the trap casing together. I have thereforedevised a novel means for this purpose, consisting in the provision oneach member at the inlet and outlet points of the easing of a pair ofears or lugs 17, the lugs'on ber 1 has the bolts 18 tapped into its earsor lugs 17, while the ears or lugs 17 on the other member are providedwith openingsthrough which the bolts 18 loosely pass, the bolts beingprovided with nuts 19 at their upper ends; With the two members thussecured together directly at these points by means additional to andextending beyond the bolts 5 for securing together the major portions ofthe two members all liability of spreading apart of. the two members andblowing out of the packing at these two points are avoided. The carsorlugs-17 on thelowermember 1 are preferably shouldered or scarfed, asseen in Fig. 3, the ears or lugs of the other member 2 beingcorrespondingly recessed or scarfed to fit such shoulders on the lowerlugs or ears.

What is claimed is- 1. A trap-casing comprising two abutting members,one bearing inlet and outlet ports and the other similarly-located inletand outlet passages communicating therewith, said two members beingsecured together throughout their major portions by bolts or the like onopposite sides of the inlet and outlet points of the casing andadditionally at such inlet and outlet points by bolts or'the likepassing through ears formed on the two members in line with andprojecting laterally beyond the ports and the other securing-bolts orthe like, substantially as described.

2. A trap-casing comprising the members 1, 2, bearinginlet and outletports 7, S, and passages 7 8, respectively, and provided with flanges 3,4, held together by bolts 5, and with cars 17 in line with andprojecting laterally beyond the ports and bolts 5, and secured togetherby bolts, 18, substantially as described.

3. A casing designed for connection witha steam system and comprisingtwo members, one provided with a port and the other with a passagecommunicating therewith, said two members being secured together bybolts or the like on opposite sides-of the port and additionally at theport by aboltor the like passing through ears formed on the two membersin line with and projecting laterally beyond the port, substantially asdescribed.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

V OARLETON W. NASON. Witnesses:

T. F. KEHOE,

FRANK A. BUoKNAM.

